Citation: Takeuchi, Y. (1966). Structures of Brittle Micas. Clays and Clay Minerals (-28,1980), 13, pp. 1-25.
Formula: Al4 Ca H2 O12 Si2
Chemical name: Ca Al2 (Al2 Si2) O10 (O H)2
List type: interleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Al12 O24 Si8 (Al3 O6 Si2)
Multiplicity: 1